CN113612935B - Video decoding server based on high-speed bus - Google Patents
Video decoding server based on high-speed bus Download PDFInfo
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- CN113612935B CN113612935B CN202010369309.3A CN202010369309A CN113612935B CN 113612935 B CN113612935 B CN 113612935B CN 202010369309 A CN202010369309 A CN 202010369309A CN 113612935 B CN113612935 B CN 113612935B
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- 238000012545 processing Methods 0.000 claims abstract description 19
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- 238000013461 design Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/21—Server components or server architectures
- H04N21/226—Characteristics of the server or Internal components of the server
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The invention relates to the technical field of digital video transmission and processing, and particularly discloses a video decoding server based on a high-speed bus, which comprises a bottom plate provided with the high-speed bus, wherein the bottom plate is arranged in a case, the high-speed bus is connected with a master card and a plurality of slave cards, the master card is an input service card, and the slave cards comprise an input service card and an acquisition output service card; the system also comprises an allocation module for automatically allocating an ID for each service card when the service card is accessed; and an interface card capable of communicating with the high-speed bus, the interface card being capable of externally inputting external video data; the interface card is also provided with a port service module which is used for mapping the ID of the slave card with the communication ports based on the communication address of the master card one by one, so that each ID corresponds to a different communication port. The whole equipment has only a single communication address to the outside, and can be connected by only one line physically, so that the simplification of multi-path connection is realized, and meanwhile, the equipment is not interfered by external access network equipment.
Description
Technical Field
The invention belongs to the technical field of digital video transmission and processing, and particularly relates to a video decoding server based on a high-speed bus.
Background
In the prior art, the traditional multi-channel digital video switching, splicing and video windowing processes mainly adopt complex switching chips and special video decoding chips, only one-to-one or one-to-many can be fixedly adopted, once hardware is determined, hardware and re-debugging are required to be changed when the requirements are changed, and when video data and formats are changed, a hardware scheme and a software scheme are required to be changed again under most conditions, if the video data and formats are 4K video sources, the existing processing method mainly comprises 2 types, one type is to sacrifice the quality of graphics, the image is cut into 1080P or lower for processing, and the other type is to update the hardware and the corresponding chips and re-design.
For example, chinese patent document with publication number CN 102724574a discloses a method for implementing multi-channel video windowing, which includes the following steps:
s101: establishing a texture pool by taking an input channel corresponding to video windowing as a keyword, wherein the texture refers to one or more two-dimensional graphs representing the surface details of caption items, and the texture pool is also called texture mapping;
s102: inquiring a corresponding texture instance in a texture pool according to the value of an input channel of a caption item to be played, returning to the corresponding texture instance if the corresponding texture instance is found, otherwise, creating a new texture instance;
s103: creating an acquisition thread and acquiring video signals;
s104: extracting video signals collected in a video pipeline in each frame, and updating corresponding texture examples in a texture pool by using the video signals;
s105: and outputting the caption items according to the scanning frequency of the system.
The inventor discloses a brand new video transmission and processing method in China patent with publication number of CN 106488162B, realizes a hand-held data exchange mode between an input service card and an acquisition output service card based on a high-speed bus, does not need a complex video data exchange chip, can solve the problems of transmission bandwidth and mode and transmission quality, and can adapt to 1080P/4K/8K, and even later image transmission and processing with larger resolution. Correspondingly, a video decoding server for video transmission and processing by applying the method is also manufactured, and a technical functional module diagram of the video decoding server is basically shown in fig. 1, wherein the technical functional module diagram of the video decoding server is exemplified by configuration of one input service card corresponding to fifteen acquisition output service cards (0-14).
However, when a plurality of service cards are set on the video decoding server, the ID of each service card can be set manually and flexibly, but a great deal of inconvenience is brought to the process of production, use and maintenance, for example, when a plurality of service cards are faced, the problem of setting errors is easy to occur; in addition, when a plurality of input service cards are provided (taking an input interface of the service card as an example, RJ 45) is taken as an input interface of the service card, because the existing design is that a network cable is directly connected with the input service card through the RJ45 interface, such a machine needs to be connected by a plurality of network cables to communicate, a large number of devices are encountered, a plurality of switches are also required to be equipped outside, and further, because the devices are provided with a plurality of IP addresses and MAC addresses outside, the collision between the IP addresses and the MAC addresses is easily caused, so that a new video decoding server based on a high-speed bus is needed to be designed.
Disclosure of Invention
The invention aims to provide a video decoding server based on a high-speed bus, which is matched with automatic ID allocation by setting uniform data access, and solves the technical problem that the ID of each service card is set only manually in the prior art, thereby bringing inconvenience to the production, the use and the maintenance of equipment.
In order to achieve the above object, a high-speed bus-based video decoding server according to the present invention includes:
a bottom plate provided with a high-speed bus, the bottom plate is arranged in the chassis,
the high-speed bus is connected with a master card and a plurality of slave cards, the master card is an input service card, and the slave cards comprise an input service card and an acquisition output service card;
the system also comprises an allocation module for automatically allocating an ID for each service card when the service card is accessed;
and an interface card capable of communicating with the high-speed bus, the interface card being capable of externally inputting external video data;
the interface card is also provided with a port service module which is used for mapping the ID of the slave card with the communication port based on the communication address of the master card one by one, so that each ID corresponds to a different communication port;
the external video data is input by the interface card according to the communication address of the main card, and is distributed to different input service cards or acquisition output service cards by the port service module according to the ports, and after being processed by a CPU (Central processing Unit) or an FPGA (field programmable gate array) of the input service card or the acquisition output service card, the video data is input to the high-speed bus by a golden finger of the input service card or the acquisition output service card;
after receiving video data input by the golden finger of the input service card or the acquisition output service card, the high-speed bus transmits the received video data to the next acquisition output service card with the nearest physical position;
the acquisition output service card processes the video data acquired from the high-speed bus, if the video data need to be displayed by the card, the video data enter a display system of the card and are then displayed by output; if the video data is required to be transmitted to other acquisition output business cards, the video data is transmitted out through the bottom plate with the high-speed bus, and the processing mode of each acquisition output business card can be switched according to the control of an external main control.
Preferably, the master card and the slave card are connected with the high-speed bus through golden finger slots, and the number of the golden finger slots is sixteen.
Further, the distribution module is that four pins on the golden finger slot are set as pins of address pins, one or more of the address pins are connected with high level through resistors on the bottom plate, and the rest address pins are grounded, so that the four-bit binary ID of the service card inserted into the slot is obtained.
Further, the distribution module is two eight-bit shift register chips, each IO port of the register chip corresponds to each golden finger slot and is respectively connected with a designated pin on each golden finger slot, the pin of each golden finger slot is short-circuited to ground to form a resistor, when a service card is inserted into a certain golden finger slot, the IO port of the shift register corresponding to the golden finger slot can be pulled down directly, and the shift register can obtain a corresponding binary value according to IO; the ID of the service card can be derived by reading this binary value.
Further, the distribution module is a 4×4 matrix key circuit arranged on the bottom plate, the insertion of the service card corresponds to the pressing of one key, the pulling out corresponds to the lifting of one key, and the ID of the currently inserted service card is obtained by processing binary data at the positions of the pressed and lifted cases in the matrix.
Preferably, the high speed bus comprises a BT1120, BTXXXX or PCI-E bus.
Preferably, a data exchange processing module is arranged on the interface card.
Preferably, the chassis on which the base plate is mounted is a 5U chassis.
Preferably, a switching power supply for supplying power is also arranged in the case.
The invention has the following advantages: compared with the prior art, the video decoding server based on the high-speed bus completes data exchange in a hand-in-hand manner, and does not need a complex video data exchange chip; the link is direct, no complex signal processing exists, and the signal integrity is maintained; the system is provided with a special video signal input/output module, each module is an independent module, each module can be independently upgraded, and the system is a framework and is all universal; because of the special video input and video output modules, the signal processing and transmission of the video can be processed in a targeted manner, and the independent modules have upgradeable operation capability and can perfectly process the video signal; for capacity expansion, the expansion can be perfectly realized by connecting a certain system home network cable without changing a hardware architecture. The internal ID and the communication port are added to manage and realize the mapping from the internal service card port to the external port, the whole equipment has only a single communication address to the outside, and the whole equipment can be physically connected by only one line, thereby realizing the simplification of multi-path connection and simultaneously enabling the equipment not to be interfered by external access network equipment.
Drawings
Fig. 1 is a functional block diagram of a related art video decoding server described in the background art.
Fig. 2 is a functional block diagram of a video decoding server technology based on a high-speed bus in an embodiment 1 of the present invention.
FIG. 3 is a schematic circuit diagram of a first automatic distribution mode according to an embodiment of the present invention.
FIG. 4 is a schematic diagram of a second automatic distribution mode circuit according to the embodiment 1 of the present invention.
Fig. 5 is a schematic circuit diagram of a third automatic distribution mode in embodiment 1 of the present invention.
Fig. 6 is a schematic diagram of a chassis structure of a video decoding server based on a high-speed bus in embodiment 1 of the present invention.
Fig. 7 is a front view of a chassis of the high-speed bus-based video decoding server in embodiment 1 of the present invention.
Fig. 8 is a schematic diagram of a rotation detecting mechanism in embodiment 2 of the present invention.
Detailed Description
The following examples are illustrative of the invention and are not intended to limit the scope of the invention. Reference numerals in the drawings of the specification include: the heat dissipation device comprises a case 1, a bottom plate 2, a heat dissipation fan 3, a switching power supply 4, a master card 51, a slave card 52, a rotating shaft 53 and blades 54.
Example 1
The basic technical functional blocks of the high-speed bus-based video decoding server and their connections in this embodiment are shown in fig. 2. As shown in the figure, the video decoding server includes a video decoding server including: the base plate is provided with a high-speed bus, the high-speed bus is connected with a master card and a plurality of slave cards, the master card is an input service card, and the slave cards comprise the input service card and an acquisition output service card; the system also comprises an allocation module for automatically allocating an ID for each service card when the service card is accessed; and an interface card capable of communicating with the high-speed bus, the interface card being capable of inputting external video data from outside through an RJ45 interface;
the interface card is also provided with a port service module which is used for mapping the ID of the slave card with the communication port based on the communication address of the master card one by one, so that each ID corresponds to a different communication port; and the data exchange processing module solves the problem of hardware link and realizes simple and effective physical connection. In this embodiment, the two modules are integrated in a single-chip microcomputer, and are implemented by programming the single-chip microcomputer.
The high-speed bus can be one of BT1120, BTXXXX or PCI-E, in the embodiment, the PCI-E high-speed bus is selected for display, and the master card, the plurality of slave cards and the interface card are communicated with the high-speed bus by serial ports; physically, the master card and the plurality of slave cards are connected by inserting their golden fingers into golden finger slots on the backplane that connect with the high speed lines. In this embodiment, there are sixteen golden finger slots for inserting the service card.
The external video data is input by the interface card according to the communication address of the main card, and is distributed to different input service cards or acquisition output service cards by the port service module according to the ports, and after being processed by a CPU (Central processing Unit) or an FPGA (field programmable gate array) of the input service card or the acquisition output service card, the video data is input to the high-speed bus by a golden finger of the input service card or the acquisition output service card;
after receiving video data input by a golden finger of an input service card or an acquisition output service card, the high-speed bus transmits the received video data to the next acquisition output service card with the nearest physical position;
the acquisition output service card processes the video data acquired from the high-speed bus, if the video data need to be displayed by the card, the video data enter a display system of the card and are then displayed by output; if the video data is required to be transmitted to other acquisition output business cards, the video data is transmitted out through the bottom plate with the high-speed bus, and the processing mode of each acquisition output business card can be switched according to the control of an external main control.
For the setting of the ID, in practical use, the problems of oxidation, contact, structure and use environment of the golden finger, the false alarm may occur in the ID setting mode in one mode, and then a manual mode is needed to correct if the false alarm occurs. The dispensing module of this embodiment therefore employs three automatic dispensing modes, one manual dispensing mode.
In the first automatic allocation mode, the four pins set as address pins on the golden finger slot are utilized to realize ID allocation, one or more of the address pins are connected with high level through resistors on the bottom plate, and the rest address pins are grounded, so that the four-bit binary ID of the service card inserted into the slot is obtained. In this embodiment, the electrical principle of this mode is basically as shown in fig. 3. In the figure, the serial number of the pcie_4x_64pin golden finger slot is 14 in the present embodiment, the 24 pins of the slot realize low frequency through resistor grounding, and the 26, 28 and 30 pins are connected with a 3V power supply 3v3_s14 through resistor to realize high level, so as to realize binary number 1110, and when the service card is inserted into the slot, the single chip microcomputer of the service card reads the binary number, so that the ID is allocated to the currently inserted service card.
In the second automatic allocation mode, two eight-bit shift register chips mounted on a bottom plate as shown in fig. 4 are adopted to realize ID allocation, each IO port (3-6, 10-13 pins of each chip in the figure) of each register chip corresponds to each golden finger slot and is respectively connected with a designated pin on each golden finger slot, the pin of each golden finger slot is short-circuited with a resistor to ground, when a service card is inserted into a certain golden finger slot, the IO port of the shift register corresponding to the golden finger slot can be directly pulled down, and the shift register can obtain a corresponding binary value according to IO; the current ID of the service card can be obtained by reading the binary value by the singlechip on the service card. In this embodiment, each golden finger slot uses 32 pins in fig. 2 as the designated pins.
In a third automatic allocation mode, as shown in fig. 5, a 4×4 matrix key circuit arranged on the bottom plate is used to realize ID allocation, insertion of a service card is equivalent to pressing a key to turn on a circuit, lifting of a key is equivalent to turning off a circuit, turning off and on different branches on the matrix circuit are generated at positions of the pressed and lifted key in the matrix, and then a singlechip on the service card can know that the key at the current position is pressed through signal change, and binary data processing is performed at the position to obtain the ID of the currently inserted service card and allocate the ID to the currently inserted service card.
After the service card obtains the ID through any two methods, the ID of one method is notified to the interface card, and the other ID number is stored in the Flash of the service card. After the interface card obtains the ID, data is sent to the corresponding ID card slot according to the ID number, and the service card of the corresponding ID card slot compares the received data with the ID number stored by the service card per se to verify whether the data is correct or not. If an incorrect situation occurs, the ID can be set correctly by means of a manually set mode.
After all the service cards have IDs, mapping the IDs of all the service cards of the interface card and communication ports based on the IP address and the MAC address, wherein each ID corresponds to a different communication port; the data communication is performed through the card slot of the bottom plate and the golden finger of the board card. By this design, the whole outside sees only the IP address and the MAC address of the main card, the IP address and the MAC address inside the whole machine and the IP address and the MAC address outside can be easily checked without conflict, and the system is very convenient to set up. And for the video data stream which is externally carried out, after entering the video decoding server through the network, the video data stream is distributed to different service cards through the port service module of the interface card.
As shown in fig. 6, in this embodiment, the chassis 1 on which the base plate 2 is mounted is a 5U chassis, the base plate 2 is vertically and fixedly disposed in a middle position at the bottom of the chassis 1, a plurality of service cards are vertically inserted on the base plate 2 through the cooperation of golden fingers and golden finger slots, a cooling fan 3 is further disposed at the bottom of the chassis 1, and a switching power supply 4 for power supply is further disposed in the chassis 1;
as shown in fig. 7, the side of each service card provided with the interface faces to the outside of the chassis 1, wherein the interface card is located at the rightmost side in the figure, the master card 51 is adjacent to the interface card, and the rest are slave cards 52.
Example 2
As shown in fig. 8, the difference between this embodiment and embodiment 1 is that a rotation detecting mechanism is further provided at a position between each service card (two slave cards 52 are exemplified in the figure) on the bottom surface in the chassis 1, the rotation detecting mechanism includes a rotating shaft 53 vertically provided on the bottom surface in the chassis 1, the rotating shaft 53 is supported on the bottom surface by a bearing, a blade 54 capable of being driven to rotate by air flow is further fixed on the end of the rotating shaft 53 by the shaft, the width of the blade 54 is slightly larger than the space between the service cards, specifically, 2-5 mm larger, and the blade 54 is made of rubber; the device also comprises a sensor (not shown in the figure) for detecting whether the blades 54 or the rotating shafts 53 rotate, wherein the sensor is more existing, can be an optical sensor or a rotary encoder, is not described in detail herein, is electrically connected with a singlechip on the interface card and is used for sending information about whether each blade 54 rotates to the interface card, each sensor can be identified by a unique identity on the interface card, and the singlechip on the interface card is also connected with a driving circuit of the cooling fan 3 of the case 1 and can start and stop the cooling fan 3 when a business card is inserted into a golden finger slot;
in the embodiment 1, the ID verification mode is naturally implemented by means of a relatively complex digital signal, if the error code occurs due to interference, the verification result is deviated, in this embodiment, when the service card is inserted into the golden finger slot, the allocation and verification mode in embodiment 1 is still implemented, but in this embodiment, the interface card further performs verification, where the interface card starts the cooling fan 3, the left and right blades 54 without the service card rotate under the influence of the air flow, and the left and right blades 54 with the service card are inserted on either side, because of their widths, they are in contact with the service card, and thus are interfered and cannot rotate, and the interface card knows which blades 54 are rotating, and which do not, because the ID of each service card in the three allocation modes in the embodiment is in a one-to-one correspondence with the position where it is inserted. Therefore, if one of the impellers at both sides of the slot position corresponding to the ID received by the interface card is still rotating at this time, it means that the service card is not inserted here, and if the ID is wrong, the error can be reported.
The process is repeated every time a service card is inserted, and the successive verification is carried out, so that the ID allocation is ensured to be correct. The blade 54 of the silica gel will not damage the service card, but in this embodiment, the position of the blade 54 will be set to a position contacting the PCB board without the element on the service card, so as to ensure that the components on the service card are not damaged. The embodiment adopts a physical mode to verify the ID more reliably, which is an important supplement to the verification mode.
While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (9)
1. A high-speed bus-based video decoding server, comprising:
a bottom plate provided with a high-speed bus, the bottom plate is arranged in the chassis,
the high-speed bus is connected with a master card and a plurality of slave cards, the master card is an input service card, and the slave cards comprise an input service card and an acquisition output service card;
the service card is characterized by further comprising an allocation module for automatically allocating an ID for each service card when the service card is accessed;
and an interface card capable of communicating with the high-speed bus, the interface card being capable of externally inputting external video data;
the interface card is also provided with a port service module which is used for mapping the ID of the slave card with the communication port based on the communication address of the master card one by one, so that each ID corresponds to a different communication port;
the external video data is input by the interface card according to the communication address of the main card, and is distributed to different input service cards or acquisition output service cards by the port service module according to the ports, and after being processed by a CPU (Central processing Unit) or an FPGA (field programmable gate array) of the input service card or the acquisition output service card, the video data is input to the high-speed bus by a golden finger of the input service card or the acquisition output service card;
after receiving video data input by the golden finger of the input service card or the acquisition output service card, the high-speed bus transmits the received video data to the next acquisition output service card with the nearest physical position;
the acquisition output service card processes the video data acquired from the high-speed bus, if the video data need to be displayed by the card, the video data enter a display system of the card and are then displayed by output; if the video data is required to be transmitted to other acquisition output business cards, the video data is transmitted out through the bottom plate with the high-speed bus, and the processing mode of each acquisition output business card can be switched according to the control of an external main control.
2. The high-speed bus-based video decoding server of claim 1, wherein the master card and the slave card are connected to the high-speed bus through golden finger slots, the number of golden finger slots being sixteen.
3. The high-speed bus-based video decoding server according to claim 2, wherein the allocation module is configured to set four pins on the golden finger slot as address pins, one or more of the address pins are connected to a high level through resistors on the bottom board, and the remaining address pins are grounded, so as to obtain a four-bit binary ID of a service card inserted into the slot.
4. The video decoding server based on the high-speed bus as claimed in claim 2, wherein the distribution module is two eight-bit shift register chips, each IO port of the register chips corresponds to each golden finger slot and is respectively connected with a designated pin on each golden finger slot, the pin of each golden finger slot is short-circuited to ground with a resistor, when a service card is inserted into a certain golden finger slot, the IO port of the shift register corresponding to the golden finger slot can be pulled down directly, and the shift register can obtain a corresponding binary value according to IO; the ID of the service card can be derived by reading this binary value.
5. The video decoding server based on high-speed bus according to claim 2, wherein the allocation module is a 4x 4 matrix key circuit arranged on the bottom board, the insertion of the service card corresponds to the pressing of one key, the pulling corresponds to the lifting of one key, and the ID of the currently inserted service card is obtained by processing binary data at the positions of the pressed and lifted cases in the matrix.
6. The high-speed bus-based video decoding server of claim 1, wherein the high-speed bus comprises a BT1120, BTXXXX or PCI-E bus.
7. The high-speed bus-based video decoding server of claim 1, wherein the interface card has a data exchange processing module disposed thereon.
8. The high-speed bus-based video decoding server of claim 1, wherein the chassis on which the backplane is mounted is a 5U chassis.
9. The high-speed bus-based video decoding server of claim 1, wherein a switching power supply for supplying power is further provided in the chassis.
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| KR100422376B1 (en) * | 2001-10-31 | 2004-03-24 | 플렉스트로닉스 세일즈 앤드 마케팅 (에이-피) 리미티드 | Card apparatus for wireless data communication |
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| CN201937590U (en) * | 2010-12-27 | 2011-08-17 | 上海鼎频通信技术有限公司 | Optical fiber transmission subsystem |
| CN104615455A (en) * | 2014-12-30 | 2015-05-13 | 北京锐安科技有限公司 | Remote upgrading method and device for IPMC program of ATCA structure |
| CN205160704U (en) * | 2015-11-19 | 2016-04-13 | 成都克瑞斯科技有限公司 | Integration streaming media service optical transmitter and receiver |
| CN106488162A (en) * | 2016-09-14 | 2017-03-08 | 深圳市微智体技术有限公司 | A kind of transmission of video based on high-speed bus and processing method |
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